2-20
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis Installation Guide
OL-10971-10
Chapter 2 Installing and Removing Power Components
Removing a DC Power Shelf
Figure 2-18
Chassis Air Filter
Step 15
Install the inlet grille. See the
“Installing the Inlet Grille” section on page 5-1
.
Removing a DC Power Shelf
This section describes how to remove a DC power shelf from the Cisco CRS 4-slot line card chassis. The
DC power shelf is comprised of both the
DC power input shelf
and the
DC power input module (PIM)
.
The DC power shelf encloses four power supplies and the power distribution connections and wiring
blocks.
The DC power input shelf is in the front of the chassis; the power input module (PIM) is in the rear of
the chassis.
Sequence of Tasks
The sequence of tasks required to remove the DC power shelf is as follows:
1.
Bring down all power to the chassis.
2.
Disconnect the input power cables.
3.
Disconnect the grounding cable.
4.
Remove the air intake (inlet) grille.
5.
Remove all DC power supplies.
6.
Remove the DC power input shelf.
7.
Remove the DC power input module (PIM).
1
Chassis air filter
3
Power tray and power supplies
2
Air intake grille
4
Power tray air filter
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